/* 头部导航栏 */
.nav{
  height: 60px;
  display: flex;
  justify-content: space-between;
}
/* 左边logo */
.nav .logo{
  min-width: 300px;
  margin-left: 10vw;
  display: flex;
  justify-content: center;
  align-items: center;
}
.nav .logo img{
  width: 80%;
  height: 80%;
}
/* 右边导航栏 */
nav{
  display: flex;
  justify-content: center;
  margin-right: 25vw;
}
.index-nav{
  display: flex;
  justify-content: start;
  align-items: center;
}
.index-nav li{
  display: inline-block;
  width: 80px;
  height: 100%;
  background-color: chocolate;
}